TY  - JOUR
AU  - Fernandez-Castanon, J.
AU  - Zanatta, M.
AU  - Comez, L.
AU  - Paciaroni, A.
AU  - Radulescu, A.
AU  - Sciortino, F.
TI  - All-DNA System Close to the Percolation Threshold
JO  - ACS Macro Letters
VL  - 8
SN  - 2161-1653
CY  - Washington, DC
PB  - ACS
M1  - FZJ-2019-00048
SP  - 84 - 87
PY  - 2019
AB  - We characterize via small-angle neutron scattering the structural properties of a mixture of all-DNA particles with functionalities 4 (A) and 2 (B) constrained by design to reside close to the percolation threshold. DNA base sequences are selected such that A particles can only bind with B ones and that at the studied temperature (10 °C) all AB bonds are formed and long-lived, originating highly polydisperse persistent equilibrium clusters. The concentration dependence of the scattered intensity and its wavevector dependence is exploited to determine the fractal dimension and the size distribution of the clusters, which are found to be consistent with the critical exponents of the 3-D percolation universality class. The value of DNA nanoparticles as nanometric patchy colloids with well-defined functionality, bonding selectivity, and exquisite control of the interaction strength is demonstrated.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000456493000014
DO  - DOI:10.1021/acsmacrolett.8b00822
UR  - https://juser.fz-juelich.de/record/859104
ER  -